COVID-19 Vaccine Information

Last update: March 31, 2022

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Visit our COVID-19 Vaccination Dashboard for up-to-date information on COVID-19 vaccinations in Ottawa.

Vaccine information

Which vaccines are approved in Canada? 


COVID-19 Vaccine Age range Type 


Recommended Interval

(time between doses)*

Potential allergen **

Pfizer BioNTech - Comirnaty

5 years and older mRNA 2 8 weeks polyethylene glycol (PEG)

Moderna - Spikevax

6 years and older  mRNA 8 weeks

polyethylene glycol (PEG)


(trometamol or Tris)

Novavax - Nuvaxovid

18 years and older Protein subunit 2 8 weeks



Medicago - Covifenz

18 to 64 years of age

Plant-based virus-like partricle

2 8 weeks Polysorbate-80
Johnson & Johnson - Janssen 18 years and older Viral-vector 1 Not applicable  Polysorbate-80

AstraZeneca - Vaxzevria / COVISHIELD

40 years and older Viral-vector  2 At least 8 weeks Polysorbate-80

* Many COVID-19 vaccines require two doses. The time between doses varies depending on the vaccine you receive and can also depend on provincial and NACI guidance. 

** See specific vaccine details for additional non-medicinal ingredients 


Please also see the Government of Canada’s list of approved vaccines authorized for use in Canada.

Who can receive first, second or third doses of the vaccine?

Who can receive their first and second dose?

  • Everyone aged five years or older at the time of their appointment is currently eligible to receive a COVID-19 vaccine.
  • The Pfizer-BioNTech, Moderna and AstraZeneca/COVISHIELD vaccines require two doses. All residents are encouraged to get vaccinated as soon as they can, and to receive further doses as soon as they are eligible to ensure maximum protection against COVID-19.
How can individuals access the Novavax (Nuvaxovid) COVID-19 vaccine?

You cannot book through the provincial portal. Booking will be through your local public health unit. Use this online form to register for a Novavax COVID-19 vaccine.

Visit our frequently asked questions about COVID-19 vaccination web page to learn more about the Novavax (Nuvaxovid) COVID-19 vaccine.

Who can receive their third dose?

Vaccination and practising public health measures like masking, avoiding gatherings, and staying home when sick, remain our strongest defense against COVID-19.

OPH recommends a third dose of COVID-19 vaccine for those who are eligible. Patients can be directed to our frequently asked questions about COVID-19 vaccination page

Third dose eligibility 

  • Third doses of an mRNA COVID-19 vaccine (Pfizer or Moderna) are recommended in Ontario for youth aged 12 to 17 if at least 168 days (approximately six months) have passed since their second dose.
    • Individuals must be at least 12 years old on the day they receive the vaccine.
  • Third doses of an approved COVID-19 vaccine are recommended in Ontario for individuals aged 18 and over (born in 2003 or earlier) if at least 84 days (approximately three months) have passed since they have received their second dose (or one dose of the Janssen vaccine.

Eligible residents can now drop-in to any Ottawa Public Health community clinic to receive their third dose of the COVID-19 vaccine. Residents may also book an appointment at a community clinic through the Provincial COVID-19 Vaccination Portal or by calling the Provincial Vaccine Contact Centre at 1-833-943-3900. 

Please ensure the minimum time interval has passed between second and third doses .

Three-dose primary series for individuals who are immunocompromised

Some individuals who are immunocompromised can get a third dose of the COVID-19 vaccine eight weeks after their second dose as part of an extended primary series. Note that in some cases the interval may be shortened as advised by your health care provider or specialist.


  • a transplant recipient (including solid organ transplant and hematopoietic stem cell transplants)
  • receiving stable, active treatment (chemotherapy, targeted therapies, immunotherapy) for a malignant hematologic disorder or solid tumor
  • in receipt of chimeric antigen receptor (CAR)-T-cell
  • an individual with moderate or severe primary immunodeficiency (for example, DiGeorge syndrome, Wiskott-Aldrich syndrome)
  • Stage 3 or advanced untreated HIV infection and those with acquired immunodeficiency syndrome
  • undergoing active treatment with the following categories of immunosuppressive therapies: anti-B cell therapies (monoclonal antibodies targeting CD19, CD20 and CD22), high-dose systemic corticosteroids, alkylating agents, antimetabolites, or tumor-necrosis factor (TNF) inhibitors and other biologic agents that are significantly immunosuppressive or are taking specific immunosuppressant medications
  • receiving dialysis (hemodialysis or peritoneal dialysis)

The third dose of vaccine will be given at least two months (eight weeks) after the second dose. Please note both Moderna and Comirnaty (Pfizer-BionTech) vaccines will be offered. Drop-in vaccinations are available for third doses at any community clinic in Ottawa during their hours of operation.

Ottawa residents who meet these criteria must present one of the following to receive their third dose:

  • A letter from their specialist or hospital program; or
  • Current prescription package, label or pharmacy receipt of an immunosuppressant medication listed by the Ontario government. The prescription must clearly label: patient name, name of medication, date of dispensing, and name of prescribing doctor.

Residents of Long-Term Care Homes (LTCH), Retirement Homes (RH), Elder Care Lodges, and elderly living in other congregate settings will also be offered a third dose, or in some cases a fourth dose. Ottawa Public Health is working with these groups directly to offer a third dose or fourth dose to residents in those settings 

Who can receive their fourth dose?

It is recommended that individuals aged 60 and over book a fourth (second booster) dose appointment at least 140 days (5 months) after their third (booster) dose. First Nation, Inuit and Métis individuals and their household members aged 18 and over are also eligible.

This aligns with the National Advisory Committee of Canada (NACI) recommendations that a longer interval between doses has shown to result in a better immune response and somewhat better vaccine effectiveness than shorter intervals. Longer time between doses gives more time for decreasing protection but may also result in a better response after the next dose.

It is recommended that individuals who wish to receive the fourth (second booster) dose between 84 days (3 months) and 140 days (5 months) consult their health care provider for individual recommendations and to assess personal risk of the benefits of receiving vaccination earlier due to the high levels of COVID-19 currently present in our community.

To book an appointment at the shorter interval individuals must call the Provincial booking line at 1-833-943-3900, between 8 a.m. and 8 p.m.

Individuals who meet the eligibility criteria can book their fourth dose appointment through the COVID-19 vaccination portal, by calling the Provincial Vaccine Contact Centre at 1-833-943-3900 or check local pharmacies to find locations that provide the booster dose. Residents are encouraged to make an appointment as drop-in availability will be limited at community vaccine clinics. Some primary care physicians are also providing booster doses. 

You can also get a fourth dose of an mRNA vaccine three months (84 days) after your third dose if you are a resident of a:

  • long-term care home
  • retirement homes
  • elder care lodge
  • other congregate setting that provide assisted-living and health services

Public health units will work with the homes who will offer fourth doses on-site within your home or make arrangements for a visit from a mobile clinic.

Some individuals who are immunocompromised can get a fourth dose (booster) three months (84 days) after completion of the three-dose primary series.

Who can receive their fifth dose?

A second booster corresponds to a 5th dose among individuals that have a recommended 3-dose primary series (e.g. moderately to severely immunocompromised individuals).  

Moderately to severely immunocompromised individuals who received a 3-dose primary series are eligible for a second booster dose if they fall into one of the groups listed:  

  • Individuals 60 years of age and older who received their first booster five months (140 days) ago. Individuals may receive a second booster (5th dose) at a minimum interval of 3 months (84 days) after their first booster dose*.  

  • First Nation, Inuit and Metis Adults and their non-indigenous household members, 18 years of age and older may be offered a second booster dose (5th dose). The second booster may be offered five months (140 days) after the first booster at the discretion of the health care provider. The minimum interval for the second booster is 3 months (84 days) after the first booster dose* 

  • Residents of long-term care homes, retirement homes, elder care lodges and older adults living in other congregate settings(60 years of age and older). A second booster (5th dose) of an mRNA vaccine is recommended for those in this group that received their first booster at least 3 months (84 days) ago.  

*As per the Ontario Ministry of Health, the longer 5-month interval is recommended as it is likely to result in a better immune response, higher vaccine effectiveness and longer duration of protection. Individuals should discuss what interval is best for them with their health care provider considering individual risk factors for exposure and risk of severe disease from SARS-CoV2 infection. 

Please also see this link to Provincial guidance for third doses (PDF).

Does my patient, who was vaccinated outside of Ontario, need another vaccine dose? 

On September 14, 2021, the Ontario Ministry of Health released an update to the provincial definition of fully vaccinated (PDF) along with guidance for individuals vaccinated outside of Ontario (PDF). Depending on the type of vaccine your patient was previously immunized with outside Ontario, patients may need one dose of an mRNA vaccine to allow them to meet Ontario’s fully vaccinated definition (PDF). The most common non-Health Canada approved vaccines reported to Ottawa Public Health are Sinovac, Sinopharm, Sputnik V and Abdala.

If your patient requires another dose of vaccine to meet the fully vaccinated definition, and you are not immunizing in your clinic, please refer them to an OPH immunization clinic.

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Supporting your patients to get vaccinated 

For more information on vaccine clinics in Ottawa, visit our public COVID-19 Vaccine webpage

Resources for patient counselling for the COVID-19 vaccines are available from the Centre of Effective Practice.

Additionally, The Public Health Agency of Canada (PHAC) has developed a resource titled the COVID-19 Vaccination Tool Kit for Health Care Providers. This resource may help your patients and colleagues make informed decisions about COVID-19 vaccination.

Finally, the 19 to Zero COVID-19 vaccination campaign has created a number of resources for healthcare professionals to use to address vaccine confidence.

Even if your patient decides not to receive the COVID-19 vaccine, please continue to recommend they stay up to date with other vaccinations, including vaccination against influenza.

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Medical Exemptions from Vaccination

The Ontario Ministry of Health and Long-Term Care has provided guidance to assist health care providers to determine if their patient has a contraindication to COVID-19 vaccination that qualifies for a medical exemption. See Table 1 in the linked Ministry of Health guidance document (PDF).

As per provincial guidance, in many instances, safe administration of subsequent doses of COVID-19 vaccine is possible under the management of an appropriate physician or nurse practitioner. True medical exemptions are expected to be infrequent and should be supported by expert consultation.

For further details - Statement of Medical Exemption – COVID-19 Vaccine

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Contraindications to Vaccination

Do not administer vaccine to patients without a consultation by an allergist if the patient has a history of severe immediate allergic reaction (e.g., anaphylaxis) to a prior administration of COVID-19 vaccine or any of the vaccine ingredients.

For immediate allergic reactions occurring within 4 hours following the first dose of immunization, including urticaria, angioedema, or anaphylaxis, patients will not be eligible to receive their second dose without evaluation by an Allergist (PDF). Allergic reactions to COVID-19 immunizations remain rare and treatable; e-consult for Allergists may reduce delays in completing COVID-19 immunization.

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Report an Adverse Event Following Immunization

Under the Health Protection and Promotion Act of Ontario, all healthcare providers are required to report AEFIs to local public health units. If you see a patient with symptoms that could possibly be related to a recent immunization, you as the healthcare provider are required to report the AEFI (PDF). Submitting a report doesn’t mean that the vaccine caused the event, but this is a critical component of monitoring the safety of all vaccines.

In addition to AEFIs, health care providers are asked to report Adverse Events of Special Interests (PDF) for COVID-19 vaccine safety surveillance. AEFIs and AESIs are reportable to the health unit of the patient’s residence.

Please take a moment to familiarize yourself with the AEFI form (PDF), which describes the AEFIs which must be reported, and Public Health Ontario’s AEFI fact sheet (PDF), which on page 2 indicates the temporal criteria for reporting based on symptom onset that can be between 24 hours to 8 weeks after vaccine administration. If you are unsure, please be proactive and report.

All AEFI reporting forms (PDF) are submitted by fax to OPH at 613-580-9660 or through our online form.

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Proof of Vaccination for Small Health Care Settings

The Ontario government has provided a guidance document (PDF) for physicians and nurse practitioners working in a community setting, including screening, staff concerns and infection prevention and control scenarios. Proof of vaccination signage has also been provided by the Ministry of Health and Long-Term Care for use in health care settings.

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Become a Vaccine Provider

Primary care providers in Ottawa are invited to administer COVID-19 vaccines in their offices. Please contact COVID Vaccine Partners at for more information. To order Pfizer-BioNTech and Moderna COVID-19 vaccines, complete the Ottawa Public Health COVID-19 vaccine order form.

There are opportunities for health care providers to provide services in mass immunization clinics or congregate setting clinics operated by Ottawa Public Health. Physician immunizers must have an independent practice license in Ontario, CMPA liability protection and an OHIP billing number (for compensation through sessional fee codes). If you have not yet participated at an OPH clinic, please email with your name, email, phone number, CPSO license number and proof of CMPA to register as a physician immunizer.

Physician Billing

The Ontario Medical Association has outlined information pertaining to billing for COVID-19 vaccination (PDF). Furthermore, the Ministry of Health and Long-Term Care publishes OHIP bulletins to update on billing concerns, which include COVID-19. Physicians should also check the OMA portal for updates. Questions regarding submission of billing codes should be directed to the Ministry of Health and Long-Term. Care’s Service Support Contact Centre at

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Resources for Healthcare providers

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<Back to the Information on COVID-19 for Physician's and Health Care Professionals webpage

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